on 04-21-2010 1:38 PM
Hello,
as of the current recommendation not to install a dual-stack system anymore, we are planning to setting up our new BW 7.0 sandbox-system as two single-stacks.
In my understanding, I have two install two separate systems (1. AS ABAP, 2. AS JAVA) and connect them each other. So each system should have it's own SID?
Procedure: I first have to setup the AS ABAP with SID=NWA and then afterwards setup the AS JAVA with SID=NWJ - and connect each other afterwards (e.g. RSPOR_SETUP and so on...).
Or am I allowed to use the same SID(=NWA) also for the AS JAVA (as it is in a dual-stack installation)? If so, am I allowed to use the same system (OS will be windows 2008) for them? In the Installation Guide I found for NW 7.0 EhP2, they still mention the dual-stack installation...
So, if you have a dual-stack installation, it looks like this:
Host: nw.sap.company.local / SID: NWA, Instance: 00 (AS ABAP) + NWA, Instance: 00 (AS JAVA)
How should it look now? Like this:
1. Host: nw.sap.company.local / SID: NWA, Instance: 00 (AS ABAP) + NWJ, Instance: 00 (AS JAVA)
2. Host: nw.sap.company.local / SID: NWA, Instance: 00 (AS ABAP) + NWJ, Instance: 01 (AS JAVA)
3. Host: nwa.sap.company.local / SID: NWA, Instance: 00 (AS ABAP)
+ Host: nwj.sap.company.local / SID: NWJ, Instance: 00 (AS JAVA with EP_CORE, BI_JAVA, ...)
In case of option 3, do they have to use their own DBMS?
Thanks in advance!
BR,
Markus
Hello,
Yes, each system (abap and java) will have its own SID.
If you have sufficient hardware ressources, it is possible to install these 2 systems on the same physical host.
You could also use MCOD to use only one database instance with 2 schema but I personally don't like this solution.
The key to not install anymore as a dual stack system is to have independency between java ans abap.
The installation will be more complicated than a dual stack but it will be easier to manage, be more reliable, easier to patch and upgrade.
Regards,
Olivier
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Hi Oliver,
thanks for you reply!
>
> Yes, each system (abap and java) will have its own SID.
> If you have sufficient hardware ressources, it is possible to install these 2 systems on the same physical host.
It's virtualized using XenServer, so I can decide to use a "large" system/virtual machine containing both ABAP and Java or to have two separate systems/virtual machines... I prefer the second solution (each with it's own DBMS/MSSQL2008) even if it's a "waste" of resources in comparison to a dual-stack system (2x OS/Windows, 2x DB/MSSQL-Server).
> You could also use MCOD to use only one database instance with 2 schema but I personally don't like this solution.
> The key to not install anymore as a dual stack system is to have independency between java ans abap.
I had a look at this also... I think there are no advantages (beside resources), because when you have to do some maintainable at the DBMS (e.g. OS updates), more than one system is affected.
> The installation will be more complicated than a dual stack but it will be easier to manage, be more reliable, easier to patch and upgrade.
Maybe, but you need an additional (hardware-)resources - as seen above. But anyway, thanks. We will try with separate hosts.
Regards,
Markus
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